Ransomware: What It Is and How to Protect Your Mississauga Business

Ransomware is the most financially damaging cyber threat facing Canadian small businesses today. The Canadian Centre for Cyber Security reports that ransomware incidents cost Canadian organisations billions annually in ransom payments, recovery costs, and lost productivity. Small businesses — including many in Mississauga and the GTA — account for a significant share of that number.

If you have not thought seriously about ransomware as a risk to your business, this guide is for you.

What Is Ransomware?

Ransomware is malicious software that encrypts the files on your computer and network, making them completely inaccessible. The attackers then demand a ransom payment — typically in cryptocurrency — in exchange for the decryption key. Without that key, your files are gone.

Modern ransomware is sophisticated. It doesn’t just encrypt your current files — it searches your network for backup drives, shared folders, and connected systems, encrypting everything it can reach before announcing itself. By the time you see the ransom demand, the damage is already done.

How Ransomware Gets Into Your Business

Understanding the entry points is the first step to blocking them.

Phishing emails are the most common delivery method — over 90% of ransomware attacks begin with an email. The email appears legitimate: a fake invoice, a shipping notification, a password reset request. A staff member clicks a link or opens an attachment, and the malware silently installs itself.

Remote Desktop Protocol (RDP) exposure is the second most common entry point. If your business has remote access enabled on any server or workstation that is visible on the internet, attackers scan for it constantly and attempt to brute-force the password.

Software vulnerabilities are another common entry. Unpatched operating systems and applications contain known security holes that ransomware operators exploit. This is why patch management is not optional.

Supply chain attacks happen when a software vendor your business trusts gets compromised. The attackers push malicious updates to all that vendor’s customers simultaneously.

What Does a Ransomware Attack Actually Cost?

The ransom demand itself is only part of the cost — and often not even the largest part.

Ransom payments for Canadian SMBs typically range from $10,000 to $500,000. Paying does not guarantee recovery — approximately 20% of businesses that pay never get their files back.

Downtime costs are often larger than the ransom. Every hour your systems are down costs you in lost productivity, missed client work, and potential contract penalties. For a 15-person office, even one full day of downtime can cost $10,000–$20,000 in lost productivity.

Recovery costs include the IT labour to rebuild systems, restore from backup (if you have one), investigate the breach, and implement improved security controls. For a typical SMB, this runs $20,000–$100,000.

Reputational damage is harder to quantify but real. Clients whose data was exposed may leave. New clients may choose a competitor with stronger security credentials.

The average total cost of a ransomware incident for a Canadian small business is estimated at $100,000–$250,000 when all factors are combined.

Should You Pay the Ransom?

Law enforcement agencies — including the RCMP and FBI — advise against paying ransoms. Here is why:

• Paying funds criminal operations and encourages further attacks
• There is no guarantee you will receive a working decryption key
• Paying marks you as willing to pay, making you a target for repeat attacks
• Your cyber insurance policy may be voided if you pay without notifying your insurer first

The best position to be in is one where paying is never necessary — because you have a clean, recent backup that ransomware cannot reach.

How to Protect Your Mississauga Business

Ransomware protection requires layered defences. No single tool prevents all attacks, but this combination addresses the major entry points.

Immutable cloud backup is the most important control. If you have a backup that ransomware cannot encrypt — stored off-site in immutable cloud storage — you can restore your systems without paying anything. Test your backups regularly. A backup you have never tested is not a backup.

Advanced endpoint protection (EDR) goes beyond traditional antivirus. It monitors system behaviour in real time and can automatically isolate a compromised device before malware spreads to the rest of your network.

Email security blocks the phishing emails that deliver most ransomware before they reach inboxes. Advanced filtering evaluates links and attachments, not just known signatures.

Multi-factor authentication (MFA) on all accounts — especially email and remote access — prevents attackers who steal or guess a password from being able to log in.

Patch management closes the software vulnerabilities that ransomware exploits. All operating systems, applications, and network devices should be patched promptly.

Security awareness training teaches your team to recognise phishing attempts. Your employees are the last line of defence when a malicious email slips through filtering.

What to Do If You Are Hit Right Now

If ransomware is actively running on your systems:

1. Immediately disconnect affected computers from the network — physically unplug the network cable or disable Wi-Fi. This limits how far the encryption spreads.
2. Do not pay immediately. Contact your IT provider and cyber insurance company first.
3. Preserve evidence. Do not restart or wipe any affected systems — investigators need them to understand the attack.
4. Notify your IT provider. They will begin containment and assessment.

The faster you disconnect infected systems, the less damage ransomware can do.

WiseTech helps Mississauga businesses implement the layered defences that prevent ransomware from succeeding — and the backup strategy that makes paying never necessary.

Talk to WiseTech about ransomware protection →

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